After the second world war, St Ives was the home of some of the world's leading modern artists. For too long their work has been characterised as local – a diversion from abstract expressionism, argues Chris Stephens

The bunker-like headquarters of the Yorkshire Post are being bulldozed to make way for a car park – yet another piece of Leeds brutalism on its way to the concrete knacker's yard. What a shame to see this modern marvel erased from history, says Christopher Beanland

With migraine-inducing blizzards of dots, rooms full of booby-traps and a Jacko soundtrack, the ever-provocative Tobias Rehberger's new installation in Frankfurt feels like modernism gone wonky, writes Adrian Searle